Tragic police discovery exposes Gold Coast mum's private torment before husband killed her.

The family of Gold Coast mother of four Teresa Bradford has spoken of their heartbreak after she was murdered by her estranged husband earlier this week.

Teresa’s brother Darren O’Brien spoke at a press conference alongside his wife Narelle and his brother Ben, telling the public Teresa was “loved by a lot of people”.

“She didn’t deserve this,” he said, 7 News reports.

The bodies of 40-year-old Teresa and her estranged husband David Bradford, 52, were found inside their Pimpama home. Police believe David broke into the property before stabbing Teresa to death and taking his own life.

He had been charged in November last year with assaulting and choking his wife, but was released on bail in early January.

Detectives found rope and gaffer tape under a bed while investigating the deaths, 7 News reports, indicating the torment Teresa was suffering behind closed doors.

Another discovery was of a photo taken in November after she was beaten her so viciously that she lost control of her bodily functions.

A close friend of Teresa said she was unaware her husband had been granted bail until it had already been approved.

"The moment she found out he had been let out, she honestly lived in fear,” Karina Mason said.

"How does someone who was facing some pretty serious charges get bail?"

Teresa's family said they would fight to ensure a similar tragedy didn't happen to anyone else.

"In honour of my sister, we will fight to get this no-bail, or some sort of ankle bracelet implemented to stop [domestic violence offenders] going near victims," Darren said.

The family has also set up a GoFundMe page to help provide for Teresa's four children, aged between eight and 17, who were home when the attack occurred.

"The children will need help and assistance throughout the coming days, months and years," the page reads.

"It is hoped that we can give some monetary assistance to them during this extremely difficult time. Please give generously to this cause and share the link to everyone that you know, thank you."

Within one day, the family has raised $9,580 of its $100,000 goal.

Friends have also started a Change.org petition, petitioning Queensland Premier Annastacia Palaszczuk and Attorney-General Yvette D'Ath to "review and change the way Magistrates grant bail applications to violent offenders."

"When violent and dangerous people are being granted bail, we are clearly not safe and our legal system is failing all of us!" the petition reads.

The petition has already reached 34,859 signatures.

Then on Wednesday, an immediate review into the state’s bail system was ordered.

If you or someone you know is in need of help, please call the National Sexual Assault, Domestic and Family Violence Counselling Service on 1800 RESPECT: 1800 737 732.